The MintyBoost is an open-source USB charger kit that fits inside a small tin or enclosure. Powered by two AA batteries, it delivers 500 mA at 5 V via a standard USB-A port — enough to charge phones, portable game consoles, GPS devices, and other USB-powered gadgets. Compatible with rechargeable AA batteries for reusable operation.

This is version 3.0, featuring improved efficiency for high-drain devices and enhanced compatibility with a wide range of USB-charged devices. The kit comes unassembled and is suitable for beginners with basic soldering skills.

Key Features

• Open-Source Design – Fully documented hardware and firmware
• 500 mA @ 5 V Output – Standard USB-A charging port
• AA Battery Powered – Uses 2× AA batteries (standard or rechargeable)
• Compact Form Factor – Fits inside a mint tin or small enclosure
• Beginner-Friendly Kit – Unassembled with through-hole components for easy soldering
• Improved Efficiency – Version 3.0 optimised for high-drain devices

Specifications

• Output – 5 V USB-A, 500 mA
• Power Source – 2× AA batteries
• Version – 3.0

Ideal For

• Portable USB device charging
• Learning to solder and build electronics kits
• Emergency backup power
• Open-source hardware projects

Package Contents

• 1× MintyBoost v3.0 Kit (unassembled electronic components)

Resources

• MintyBoost Project Guide
• Device Compatibility List